The interdental area is the part of gingiva which extends in between two teeth up to the contact point. The interdental gingiva occupies the gingival embrasure, which is the interproximal space between the teeth, apical to the tooth contact. The interdental embrasure can be pyramidal or have a “col” shape.

Is interdental col Keratinized?

The interdental gingiva consists of a col-shaped part, bordered by a vestibular and palatal/lingual interdental papilla. The col is covered by a stratified non-keratinized epithelium (17, 30–32), whereas a stratified keratinized epithelium covers the interdental papillae (18).

What is a col shape?

He named this concave shape a col, which means a depression between two peaks.